When Sony's internal Japan Studio set out to work on Gravity Rush (Gravity Daze in Japan), the game was positioned as a PlayStation 3 title. According to an interview with the US PlayStation Blog, the team "came across PS Vita along the way" and realized it was "perfect for the game."
That's not the weird part, though. The game's primary influence is cited as Realtime Worlds' 2007 Xbox 360 game, Crackdown. "I really like the aspect of unlocking skills and becoming more powerful, and achieving a higher level of freedom as you become more powerful," one team member said. "I enjoyed moving in that game." Given that Gravity Rush is an open world game in a third-person view with an upgradable character, the comparison makes sense. Both games feature unrealistic art styles accentuating the fantastical gameplay, making their crossover even clearer.
While Gravity Daze has been out for a bit in Japan, Gravity Rush won't float to US shores for another few months.